<template>
  <h2>toRef的使用及特点</h2>
  <h3>state:{{ state }}</h3>
  <h3>age:{{ age }}</h3>
  <h3>money:{{ money }}</h3>
  <hr />
  <button @click="update">更新数据</button>

  <hr />
  <Child :age="age" />
</template>
<script lang="ts">
import { defineComponent, reactive, ref, toRef } from 'vue'
import Child from './components/Child.vue'
export default defineComponent({
  name: 'App',
  components: { Child },
  setup(props) {
    const state = reactive({
      age: 5,
      money: 100
    })
    const age = toRef(state, 'age')
    const money = ref(state.money)
    const update = () => {
      // 更新数据
      console.log(11)
      state.age += 2
      // age.value += 3
      // money.value += 10
    }
    return {
      state,
      age,
      money,
      update
    }
  }
})
</script>
